Shelf clamp



FIG. 1 is a left, rear perspective view of my shelf clamp illustrating our new design;

FIG. 2 is a right, front perspective view of the shelf clamp illustrated in FIG. 1;

FIG. 3 is a rear view of the shelf clamp illustrated in FIG. 1;

FIG. 4 is a left side plan view of the shelf clamp illustrated in FIG. 1;

FIG. 5 is a front view of the shelf clamp illustrated in FIG. 1; and,

FIG. 6 is a top view of the shelf clamp illustrated in FIG. 1. 

CLAIM The ornamental design for a shelf clamp, as shown and described. 